<template>
  <div>
    App
    <!-- A 与 B 组件是兄弟关系 -->
    <A />
    <B />
</template>

<script>
import Vue from "vue";
import A from "./A.vue";
import B from "./B.vue";

export default {
  name: "App",
  components: {
    Vue,
    A,
    B,
  },
  mounted() {
    // console.log("this", this);
    // console.log(this.__proto__.__proto__ === Vue.prototype);
  },
};
</script>

<style>

</style>>
